Adjustment-Free In-Shot Burners . The natural (or optional LP) gas is ignited by the direct spark ignition at the in-shot burners. The in-shot burner’s shutter-free design requires no adjustments to regulate the air/gas mixture.
Efficient Primary & Secondary Heat Exchanger. The Rheem Classic® 90 Plus® heat exchanger is renowned for its dependability and efficiency. It’s constructed of aluminized and stainless steel for maximum resistance to rust and corrosion. And it’s backed by a limited lifetime warranty.
Slide-Out Blower. Thanks to adjustable controls for the blower, your technician can precisely match airflow to the specific comfort requirements of your home.
Easy To Access and Clean Filter. The Rheem Classic® 90 Plus® is equipped with a permanent, washable filter that’s easy to access and clean. You won’t ever have to deal with the hassle and expense of replacement filters.
Efficient Direct Spark Ignition. Direct spark ignition is an extremely dependable and efficient way to light the burner. And it eliminates the need for a standing pilot. For added safety, the remote flame sensor constantly monitors the burner flame to ensure it is operating as it should.
Slow-Open Gas Valve. The redundant gas valve is a 24-volt slow-opening valve that delivers gas in a regulated flow to the patented “in-shot” burners.
Quiet Draft Inducer. This draft inducer, which was specifically designed for the 90 Plus® upflow gas furnace, quietly provides air for combustion while simultaneously venting outdoors the products of combustion from the furnace heat exchanger.
Integrated Furnace Control with Standardized On-Board Diagnostics. The “Brain” of the Rheem Classic® 90 Plus® is the Integrated Furnace Control (IFC) which directs all activities of major furnace components. The control features low-speed continuous fan operation and accessory terminals
